Improvement in bit-stock



lllldte (C/taire l AUGUSTUS STANLEY, OF NEW BRITAIN, CONNECTICUT.'

Lette-rs Patent No. 97,455, dated NoremberO, 1869; (mtedaied*November 20, 1869.

IMPRQVEMET IN BIT-STOCK.

To. all whom it mcg/'concerne Beit known that I-,AUGUs'rs STANLEY, ofN ew Britain, in the county of IIartiord, and State of Gon nectient, have invented anew and improved Bit-Stock and I do hereby declare that the following is a i'ull, clear, and exact description thereof, which will enable others skilled in the art to make and use the saine, reference being had to the accompanying drawings, making a part of this specicatiomin which- Figure 1 is front elevation of my invention, with a sectional View of the.1'1ead. i

Figure 2 is afront elevation of the socket-end of the bit-stock before the paw] and spring are inserted.

Figure 3 is a side elevation of the same, with the pawl and spring att-ached.

Figure 4 is a front elevation of the pawl.

Figure 5 is a side elevation of the saine.

Similar letters of reference indicate like parts.

My invention relates to bit-stocks, and consists in the construction and arrangement ofthe various parts, as will be fully described hereinafter.

The body A ofthe bit-stockand its head B can be of any suitable construction, of the ordinary styles.

The socket-end o of the bitfstock is also ot' nearly the ordinary style.

I construct the pawl or lever b much shorter than an ordinary pawl. i

The end that engages with the bit m is made of a circula-r form, instead of the usual square or hook-ed forni.

As the socket a is of ordinary length, and it would be inconvenient to have the end of the pawl or lever b project below the socket a, I am obliged to construct the pawl of the peculiar' shape and length described and shown, in order to make it operate in the space desired, and, at the saine. time, to be out of the way in use.

' The pawl or lever l) is raised by spiral spring c, and pivoted to arms h h by pivot fi. l

One end ofspiral spring o rests in cavity d, and the other' is held in place bythe small tenon 7:,011 theunder side of` the pawl or lever l1, which pawl b is placed with the pawliend upward, which position is* Vthe reverse ofthe ordinary pawl in bit-stocks.

e designates a cavity to receive the end of the paw] b.

A suitablenotch is made in the usual place in the shank of bit in, which bit an is placed in the socket when the pawl-end of lever?) enters the above-inentioned notch,y and secures the bit m rigidly in its plate, as shown by the broken' linesin g. 3.

As the fulcrnm or pivot 'i of the lever or pawl b is below the pawl-end, any attempt to withdraw the bit mi, without raising the `paw] b, will onlycause the pawl l) to press the bit m more closely, and thus hold 'it tirmer in its place, without any assistance ofthe spiral spring c, which spring c is simply to throw the pawl b into the notch in the bit ym., and not to hold it in its place, and consequentlythe spring c can bo made very light.

In the'ordinary lnauner of attaching a lever-pawl to abit-stock, the pawl is below the. pivot, and therefore itywill often rise, and allow the bit to withdraw, by simply pulling ou thesaine, and therefore the spring, either spiral or fiat, must he strong.;` and stift', to hold the pawl in its pla-cc.

By luy invention, I produce an article for a bit-stock whereby the inconvenience and annoyance of the bit withdrawing when in use are entirely overcome. It can be made equally as cheap as others, and is much in ore durable and less liable to get out of repair.

I do not claim simply placing the. pawllend above the pivot, as the same canreadily be done in bitstocks where there is sutiicient room to make the pawl of any desired length.

That I claiin as new, and desire to secure. by Letters Patent, is-

As a new article of manufactu1'c,thc hereindescribed brace, consisting ci thellead B, bodyA, socket a, 'inverted pawl '1), arlns h h, spring c, and pivot i, the

whole constructed and arranged substantially as shown and described, and for the purposes set forth.

Witnesses: AUGUSTUS CTAN-LEY.

'JAMES SHEPARD, lHnNnv S. Wanne 

